Winner
Data from Amazon and official First Alert and Heiman sites.
2026 verdict
For most buyers in 2026, First Alert SC5 Hardwire Smart Smoke & CO Alarm is the safer pick over Heiman HS1SA Series Smoke Alarm because of sensors, alerts, and steam check. What pushes it ahead is sensors, alerts, and steam check, and its broader overall balance keeps the advantage from looking narrow. The only strong reason to choose Heiman HS1SA Series Smoke Alarm is if price, rating, and built-in light is more important to you than the overall verdict. That is why First Alert SC5 Hardwire Smart Smoke & CO Alarm wins the verdict here.
vs
| Feature | First Alert SC5 Hardwire Smart Smoke & CO Alarm | Heiman HS1SA Series Smoke Alarm | Winner |
|---|---|---|---|
| Price | $129.00 | £16.14 | Heiman HS1SA Series Smoke Alarm |
| Rating | 2.8 | 4.5 | Heiman HS1SA Series Smoke Alarm |
| Sensors | Smoke, CO | Smoke | First Alert SC5 Hardwire Smart Smoke & CO Alarm |
| Alerts | Fire Alerts, CO Alerts, Low Battery Alerts | Fire Alerts, Low Battery Alerts | First Alert SC5 Hardwire Smart Smoke & CO Alarm |
| Built-in Light | NO | YES | Heiman HS1SA Series Smoke Alarm |
| Steam Check | YES | NO | First Alert SC5 Hardwire Smart Smoke & CO Alarm |
| Connectivity | 2.4 GHz WiFi | Zigbee | Tie |
| Integrations | Google Home | Home Assistant | Tie |
| Screen | NO | NO | Tie |
| Built-in Siren | YES | YES | Tie |
| Tests Itself | NO | NO | Tie |
| Pathlight | NO | NO | Tie |
Winner
- + Sensors: Smoke, CO
- + Alerts: Fire Alerts, CO Alerts, Low Battery Alerts
- + Steam Check: YES
- - Price: $129.00 vs £16.14
- - Rating: 2.8 vs 4.5
5% OFF
£16.14
£16.99
- + Price: £16.14
- + Rating: 4.5
- + Built-in Light: YES
- - Sensors: Smoke vs Smoke, CO
- - Alerts: Fire Alerts, Low Battery Alerts vs Fire Alerts, CO Alerts, Low Battery Alerts
Frequently Asked Questions (FAQ)
Which is better overall: First Alert SC5 Hardwire Smart Smoke & CO Alarm or Heiman HS1SA Series Smoke Alarm?
First Alert SC5 Hardwire Smart Smoke & CO Alarm has the stronger overall profile in this comparison, especially for sensors, alerts, and steam check.
What is the biggest difference between First Alert SC5 Hardwire Smart Smoke & CO Alarm and Heiman HS1SA Series Smoke Alarm?
Price is one of the clearest differences: First Alert SC5 Hardwire Smart Smoke & CO Alarm lists $129.00, while Heiman HS1SA Series Smoke Alarm lists £16.14.
Which one looks better on price?
First Alert SC5 Hardwire Smart Smoke & CO Alarm is listed at $129.00, while Heiman HS1SA Series Smoke Alarm is listed at £16.14. Heiman HS1SA Series Smoke Alarm (better spec).
Who should buy First Alert SC5 Hardwire Smart Smoke & CO Alarm?
Choose First Alert SC5 Hardwire Smart Smoke & CO Alarm if your priority is sensors and alerts and that matters more than price.
Who should buy Heiman HS1SA Series Smoke Alarm?
Choose Heiman HS1SA Series Smoke Alarm if your priority is price and rating and that matters more than sensors.
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